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  • How to create XML validator(验证器;验证程序) from XML schema

    In order to check XML data for validity we have to prepare its schema XSD-file. This file will be loaded by a JAXP package to a Schema objects instance. Then we'll use Schema to produce Validator which can then be used to validate any document with type defined in outr schema.

    import javax.xml.transform.stream.StreamSource;
    import javax.xml.validation.Schema;
    import javax.xml.validation.SchemaFactory;
    import javax.xml.validation.Validator;
    
    import org.xml.sax.SAXException;
    
    /**
     * A sample application which shows how to perform a XML document validation.
     */
    
    public class Test {
        public static void main(String[] args) {
            try {
                // define the type of schema - we use W3C:
                String schemaLang = "http://www.w3.org/2001/XMLSchema";
    
                // get validation driver:
                SchemaFactory factory = SchemaFactory.newInstance(schemaLang);
    
                // create schema by reading it from an XSD file:
                Schema schema = factory.newSchema(new StreamSource("contacts.xsd"));
                Validator validator = schema.newValidator();
    
                // at last perform validation:
                validator.validate(new StreamSource("contacts.xml"));
    
            } catch (SAXException ex) {
                // we are here if the document is not valid:
                System.out.println(ex.getMessage());
                // ... process validation error...
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/ghgyj/p/4020842.html
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